Archiv für Protistenkunde最新文献_第3页

Archiv für Protistenkunde Pub Date : 1997-10-01 DOI: 10.1016/S0003-9365(97)80003-6

引用次数: 0

Cercomonads and their relationship to the myxomycetes 细菌及其与黏菌的关系

Archiv für Protistenkunde Pub Date : 1997-10-01 DOI: 10.1016/S0003-9365(97)80010-3

Serguei A. Karpov

{"title":"Cercomonads and their relationship to the myxomycetes","authors":"Serguei A. Karpov","doi":"10.1016/S0003-9365(97)80010-3","DOIUrl":"10.1016/S0003-9365(97)80010-3","url":null,"abstract":"<div>The typical cercomonad structure (based on original investigations of Heteromita sp., Cercomonas agilis and literature data) is as follows: the amoeboflagellate cell is covered by only a distinct glycocalyx; there are two flagella, extrusomes, microbodies, mitochondria with vesicular cristae, and the nucleus has a sharp end directed towards the basal bodies. Absolute orientation of the flagellar apparatus reveals an anterior basal body directed in a forward or ventral direction, and the posterior basal body is located on the ventral side and is directed to the right. There are 2–4 lateral microtubular rootlets, a layered structure and a nuclear fibrillar rootlet. A dictyosome occupies the dorsal position. The life-cycle of cercomonads includes a plasmodial stage. Comparison of cercomonad morphology and life-cycles with those of myxomycetes (predominantly with zoospores of protostelids) and Hyperamoeba flagellata (a fresh-water protist of uncertain taxonomic position) reveals the homology of structures in the flagellar rootlet system; the same absolute orientation of the flagellar apparatus and dictyosome; and mitochondria with vesicular cristae. Homology of the main stages in the life-cycles of all three groups has been also proposed. The relationship of cercomonads and protostelids has been confirmed by new ultrastructural data, and H. flagellata is considered as a bridge between these two groups. This view contradicts molecular data which usually demonstrates a long distance between cercomonads and myxomycetes.</div>","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"148 3","pages":"Pages 297-307"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0003-9365(97)80010-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77564009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 33

A Third Kingdom of eukaryotic life: History of an idea 真核生物的第三王国:一个观念的历史

Archiv für Protistenkunde Pub Date : 1997-10-01 DOI: 10.1016/S0003-9365(97)80004-8

Mark A. Ragan

引用次数: 14

The identity and composition of the Euglenozoa 裸藻门的特性和组成

Archiv für Protistenkunde Pub Date : 1997-10-01 DOI: 10.1016/S0003-9365(97)80012-7

Alastair G.B. Simpson

引用次数: 115

Monophyletic origin of the genus Sauroleishmania 索罗利什曼属的单系起源

Archiv für Protistenkunde Pub Date : 1997-10-01 DOI: 10.1016/S0003-9365(97)80007-3

David Croan , John Ellis

{"title":"Monophyletic origin of the genus Sauroleishmania","authors":"David Croan , John Ellis","doi":"10.1016/S0003-9365(97)80007-3","DOIUrl":"10.1016/S0003-9365(97)80007-3","url":null,"abstract":"<div>A 1268-bp DNA fragment representing 25% of the RNA polymerase II largest subunit gene has been used to infer the phylogenetic relationships among four Sauroleishmania species, and their relatedness to the closely related genera Leishmania and Endotrypanum. Comparison of the nucleotide sequences showed that 94% of phylogenetically informative sites occurred at silent codon positions. Distance (neighbor-joining) and weighted parismony analysis of the nucleotide sequence alignment each produced alternate optimal trees which varied in the placement of L. (Viannia) braziliensis and the Sauroleishmania. The cost of branch swapping (number of steps in parsimony analysis) indicated that few steps were required to alternate between these topologies (representing 0.5% of total tree length). In contrast, distance and parsimony analysis of the predicted protein sequence yielded congruent results. The calculated homoplasy, retention and rescaled consistency indices of the protein sequence data indicated that homoplasy was significantly reduced in the protein sequence alignment as compared to the nucleotide sequence alignment. The protein-inferred phylogenies provide strong support for the monophyly of the Sauroleishmania and indicate that these parasites emerged subsequent to the separation of the Leishmania subgenera L. (Leishmania) and L. (Viannia). The close affiliation between Leishmania and Sauroleishmania suggests that the lizard parasites might best be retained in the genus Leishmania.</div>","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"148 3","pages":"Pages 269-275"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0003-9365(97)80007-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85363225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Early evolution of eukaryotes inferred from protein phylogenies of translation elongation factors 1α and 2 从翻译延伸因子1α和2的蛋白质系统发育推断真核生物的早期进化

Archiv für Protistenkunde Pub Date : 1997-10-01 DOI: 10.1016/S0003-9365(97)80009-7

Tetsuo Hashimo , Yoshihiro Nakamura, Takashi Kamaishi, Masami Hasegawa

引用次数: 31

Species of the Paramecium aurelia complex Sonneborn in Germany 德国索内伯恩草履虫复合体的种

Archiv für Protistenkunde Pub Date : 1997-06-01 DOI: 10.1016/S0003-9365(97)80042-5

Ewa Przyboś , Sergei Fokin

引用次数: 9

Choanoflagellates (acanthoecidae, choanoflagellida) from the Weddell Sea, Antarctica, Taxonomy and community structure with particular emphasis on the ice biota; with preliminary remarks on choanoflagellates from Arctic sea ice (Northeast Water Polynya, Greenland) 南极威德尔海棘皮鞭毛虫(棘皮科，棘皮鞭毛虫)的分类和群落结构，特别强调了冰生物群北极海冰(格陵兰岛东北水冰原)中鞭藻的初步研究

Archiv für Protistenkunde Pub Date : 1997-06-01 DOI: 10.1016/S0003-9365(97)80038-3

Helge Abildhauge Thomsen , David L. Garrison , Carol Kosman

{"title":"Choanoflagellates (acanthoecidae, choanoflagellida) from the Weddell Sea, Antarctica, Taxonomy and community structure with particular emphasis on the ice biota; with preliminary remarks on choanoflagellates from Arctic sea ice (Northeast Water Polynya, Greenland)","authors":"Helge Abildhauge Thomsen , David L. Garrison , Carol Kosman","doi":"10.1016/S0003-9365(97)80038-3","DOIUrl":"10.1016/S0003-9365(97)80038-3","url":null,"abstract":"<div>Ice biota studies in the Antarctic region, Weddell Sea, have focused on an examination of single cells and an analysis of community structure of the flagellate assemblage from sea ice and comparisons with planktonic assemblages. Based on extensive light microscopical analysis of 40 samples ranging from open water to “brown-ice” habitats, it became evident through clustering of the data, that the mature choanoflagellate community from ice is significantly different from both the water column community and those encountered in samples derived from newly formed ice (i.e. grease ice, platelet ice, nilas and thin pancakes). The choanoflagellates from sea ice encompasses a range of previously undescribed loricate taxa (Acanthocorbis nana sp. nov., A. weddellensis sp. nov., A. prolongata sp. nov., Apheloecion antarctica sp. nov., A. glacialis sp. nov., A. conicoides sp. nov., Calliacantha frigida sp. nov., C. ankyra sp. nov., Diaphanoeca multiannulata subsp. nov. glacialis, Parvicorbicula corynocostata sp. nov., P. pachycostata sp. nov.). These taxa have been investigated using a combination of light, and electron microscopy. A preliminary investigation of samples from the Arctic (NE Greenland) indicates that the loricate choanoflagellate diversity is significantly lower in Arctic sea ice.</div>","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"148 1","pages":"Pages 77-114"},"PeriodicalIF":0.0,"publicationDate":"1997-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0003-9365(97)80038-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85768172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 33

Contributions to the knowledge of the French desmid flora I. New and noteworthy taxa from the central and Eastern Pyrenees 对法国菊苣植物区系知识的贡献1 .比利牛斯山脉中部和东部新的和值得注意的分类群

Archiv für Protistenkunde Pub Date : 1997-06-01 DOI: 10.1016/S0003-9365(97)80035-8

Frans A.C. Kouwets

引用次数: 8

Cladistic relationships and generic characterization of oxytrichid hypotrichs (protozoa, ciliophora) 毛蝗属(原生动物，纤毛蝗)的分支关系及属学特征

Archiv für Protistenkunde Pub Date : 1997-06-01 DOI: 10.1016/S0003-9365(97)80048-6

Helmut Berger , Wilhelm Foissner

{"title":"Cladistic relationships and generic characterization of oxytrichid hypotrichs (protozoa, ciliophora)","authors":"Helmut Berger , Wilhelm Foissner","doi":"10.1016/S0003-9365(97)80048-6","DOIUrl":"10.1016/S0003-9365(97)80048-6","url":null,"abstract":"<div>The relationships of 13 common oxytrichid genera were analysed using cladistic methods (Hennig, PAUP). Twenty-three characters in four groups were selected, viz. the morphology of the oral apparatus (three characters), infraciliature of ventral and dorsal side (ten characters), cortical features (two characters), and ontogenetic particulars (eight characters). All characters and character states are described and discussed using published and original data. Half of the characters originated independently in several genera at least twice, making it very difficult to follow oxytrichid evolution. The autapomorphies of the family Oxytrichidae are 18 characteristically arranged fronto-ventral-transverse cirri and the fragmentation of at least one dorsal kinety. The cladograms show two major branches, termed subfamily Oxytrichinae Jankowski and subfamily Stylonychinae n. subfam. The Oxytrichinae have a unique synapomorphy, viz. the participation of cirrus V/3 in primordia formation. This subfamily contains the genera Cyrtohymena, Gonostomum, Notohymena, Onychodromopsis, Oxythcha, Tachysoma, Urosoma, Urosomoida and, very likely, Australocirrus, Parurosoma and Pseudostrombidium. The Stylonychinae have three synapomorphies, viz. the rigid body, an oral apparatus of more than 40% of body length, and the lack of cortical granules. This subfamily comprises Coniculostomum, Histriculus, Steinia, Sterkiella, Stylonychia and, very likely, Parastylonychia and Pleurotricha. The family Oxytrichidae, its subfamilies, and the genera included are characterized and keyed. An unambiguous terminology is established for oxytrichid hypotrichs, and synonymy and nomenclature of genera are discussed.</div>","PeriodicalId":100118,"journal":{"name":"Archiv für Protistenkunde","volume":"148 1","pages":"Pages 125-155"},"PeriodicalIF":0.0,"publicationDate":"1997-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0003-9365(97)80048-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81898289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 90